Grounding; Grounding The Got - Mitsubishi Electric GOT2000 Series User Manual

7.3

Grounding

Each GOT has the following ground terminals.
• GT27 (except GT2705-V), GT25, GT23: FG terminal and LG terminal
• GT2705-V, GT21
7.3.1

Grounding the GOT

■1. Grounding method
Ground the GOT as shown below.
(1) For GT27, GT25, GT23, and GT2105-Q
• Use independent grounding as much as possible for the GOT.
Ground the GOT with a ground resistance of 100 Ω or less.
• When independent grounding cannot be applied for the GOT, use shared grounding as shown in (2) below.
GOT Other device

Grounding

(ground resistance:
100 Ω or less)
(1) Independent grounding
• For the grounding methods of (1) and (2) above, use a cable with 2 mm
Make a ground point near the GOT as much as possible to shorten the ground cable.
(2) For GT2104-R, GT2104-P, and GT2103-P
• Use independent grounding as much as possible for the GOT.
Ground the GOT with a ground resistance of 100 Ω or less.
• When independent grounding cannot be applied for the GOT, use shared grounding as shown in (2) below.
GOT Other device
(1) Independent grounding
• Make a ground point near the GOT as much as possible to shorten the ground
■2. Grounding examples
(1) Independent grounding (Best)
For grounding for control system, ground the system at one end.
Especially for the control devices communicating each other, ground the system at one end.
7 - 6
7.3 Grounding
: FG terminal
GOT
(ground resistance:
......
Best (2) Shared grounding
GOT
......
Best (2) Shared grounding
Power equipment
(such as servo)
FG
CN1A CN 1B
LG
CN2 CN3
FG
Ground
Panel
terminal
grounding
block
Grounding for
power system
Other device
Grounding
100 Ω or less)
......
Good (3) Common grounding
Other device
......
Good (3) Common grounding
Connection cable
FG
LG
Ground terminal block
Grounding for
control system
GOT
Other device
......
Not allowed
2
or more cross section.
GOT
Other device
......
Not allowed
cable.
GOT